51897616 has 15 divisors (see below), whose sum is σ = 100607493. Its totient is φ = 25934400.

The previous prime is 51897613. The next prime is 51897631. The reversal of 51897616 is 61679815.

It is a happy number.

The square root of 51897616 is 7204.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6739216 + 45158400 = 2596^2 + 6720^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51897611) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 27916 + ... + 29716.

Almost surely, 2^51897616 is an apocalyptic number.

51897616 is the 7204-th square number.

It is an amenable number.

51897616 is a deficient number, since it is larger than the sum of its proper divisors (48709877).

51897616 is an frugal number, since it uses more digits than its factorization.

51897616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610 (or 1803 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The cubic root of 51897616 is about 373.0059871531.

The spelling of 51897616 in words is "fifty-one million, eight hundred ninety-seven thousand, six hundred sixteen".